Competitive generative models with structure learning for NLP classification tasks Kristina Toutanova author 2006-07 text Proceedings of the 2006 Conference on Empirical Methods in Natural Language Processing Dan Jurafsky editor Eric Gaussier editor Association for Computational Linguistics Sydney, Australia conference publication toutanova-2006-competitive https://aclanthology.org/W06-1668/ 2006-07 576 584